diff --git a/quickjs-atom.h b/quickjs-atom.h
index 50a9099..6b78579 100644
--- a/quickjs-atom.h
+++ b/quickjs-atom.h
@@ -230,6 +230,7 @@ DEF(Map, "Map")
 DEF(Set, "Set") /* Map + 1 */
 DEF(WeakMap, "WeakMap") /* Map + 2 */
 DEF(WeakSet, "WeakSet") /* Map + 3 */
+DEF(Iterator, "Iterator")
 DEF(Map_Iterator, "Map Iterator")
 DEF(Set_Iterator, "Set Iterator")
 DEF(Array_Iterator, "Array Iterator")
diff --git a/quickjs.c b/quickjs.c
index 9a17c08..16de7ee 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -157,6 +157,7 @@ enum {
     JS_CLASS_SET,               /* u.map_state */
     JS_CLASS_WEAKMAP,           /* u.map_state */
     JS_CLASS_WEAKSET,           /* u.map_state */
+    JS_CLASS_ITERATOR,          /* u.map_iterator_data */
     JS_CLASS_MAP_ITERATOR,      /* u.map_iterator_data */
     JS_CLASS_SET_ITERATOR,      /* u.map_iterator_data */
     JS_CLASS_ARRAY_ITERATOR,    /* u.array_iterator_data */
@@ -453,7 +454,7 @@ struct JSContext {
     JSValue regexp_ctor;
     JSValue promise_ctor;
     JSValue native_error_proto[JS_NATIVE_ERROR_COUNT];
-    JSValue iterator_proto;
+    JSValue iterator_ctor;
     JSValue async_iterator_proto;
     JSValue array_proto_values;
     JSValue throw_type_error;
@@ -1540,6 +1541,7 @@ static JSClassShortDef const js_std_class_def[] = {
     { JS_ATOM_Set, js_map_finalizer, js_map_mark },             /* JS_CLASS_SET */
     { JS_ATOM_WeakMap, js_map_finalizer, js_map_mark },         /* JS_CLASS_WEAKMAP */
     { JS_ATOM_WeakSet, js_map_finalizer, js_map_mark },         /* JS_CLASS_WEAKSET */
+    { JS_ATOM_Iterator, NULL, NULL },                           /* JS_CLASS_ITERATOR */
     { JS_ATOM_Map_Iterator, js_map_iterator_finalizer, js_map_iterator_mark }, /* JS_CLASS_MAP_ITERATOR */
     { JS_ATOM_Set_Iterator, js_map_iterator_finalizer, js_map_iterator_mark }, /* JS_CLASS_SET_ITERATOR */
     { JS_ATOM_Array_Iterator, js_array_iterator_finalizer, js_array_iterator_mark }, /* JS_CLASS_ARRAY_ITERATOR */
@@ -2132,6 +2134,7 @@ JSContext *JS_NewContextRaw(JSRuntime *rt)
     for(i = 0; i < rt->class_count; i++)
         ctx->class_proto[i] = JS_NULL;
     ctx->array_ctor = JS_NULL;
+    ctx->iterator_ctor = JS_NULL;
     ctx->regexp_ctor = JS_NULL;
     ctx->promise_ctor = JS_NULL;
     init_list_head(&ctx->loaded_modules);
@@ -2251,7 +2254,7 @@ static void JS_MarkContext(JSRuntime *rt, JSContext *ctx,
     for(i = 0; i < rt->class_count; i++) {
         JS_MarkValue(rt, ctx->class_proto[i], mark_func);
     }
-    JS_MarkValue(rt, ctx->iterator_proto, mark_func);
+    JS_MarkValue(rt, ctx->iterator_ctor, mark_func);
     JS_MarkValue(rt, ctx->async_iterator_proto, mark_func);
     JS_MarkValue(rt, ctx->promise_ctor, mark_func);
     JS_MarkValue(rt, ctx->array_ctor, mark_func);
@@ -2315,7 +2318,7 @@ void JS_FreeContext(JSContext *ctx)
         JS_FreeValue(ctx, ctx->class_proto[i]);
     }
     js_free_rt(rt, ctx->class_proto);
-    JS_FreeValue(ctx, ctx->iterator_proto);
+    JS_FreeValue(ctx, ctx->iterator_ctor);
     JS_FreeValue(ctx, ctx->async_iterator_proto);
     JS_FreeValue(ctx, ctx->promise_ctor);
     JS_FreeValue(ctx, ctx->array_ctor);
@@ -42161,11 +42164,23 @@ static JSValue js_array_iterator_next(JSContext *ctx, JSValueConst this_val,
     }
 }
 
+static JSValue js_iterator_constructor(JSContext *ctx, JSValueConst new_target,
+                                       int argc, JSValueConst *argv)
+{
+    if (JS_IsUndefined(new_target))
+        return JS_ThrowTypeError(ctx, "constructor requires 'new'");
+    /* XXX: cannot be invoked directly */
+    return js_create_from_ctor(ctx, new_target, JS_CLASS_ITERATOR);
+}
+
 static JSValue js_iterator_proto_iterator(JSContext *ctx, JSValueConst this_val,
                                           int argc, JSValueConst *argv)
 {
     return JS_DupValue(ctx, this_val);
 }
+ 
+static const JSCFunctionListEntry js_iterator_funcs[] = {
+};
 
 static const JSCFunctionListEntry js_iterator_proto_funcs[] = {
     JS_CFUNC_DEF("[Symbol.iterator]", 0, js_iterator_proto_iterator ),
@@ -46343,7 +46358,7 @@ void JS_AddIntrinsicRegExp(JSContext *ctx)
     JS_SetPropertyFunctionList(ctx, obj, js_regexp_funcs, countof(js_regexp_funcs));
 
     ctx->class_proto[JS_CLASS_REGEXP_STRING_ITERATOR] =
-        JS_NewObjectProto(ctx, ctx->iterator_proto);
+        JS_NewObjectProto(ctx, ctx->class_proto[JS_CLASS_ITERATOR]);
     JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_REGEXP_STRING_ITERATOR],
                                js_regexp_string_iterator_proto_funcs,
                                countof(js_regexp_string_iterator_proto_funcs));
@@ -49935,7 +49950,7 @@ void JS_AddIntrinsicMapSet(JSContext *ctx)
 
     for(i = 0; i < 2; i++) {
         ctx->class_proto[JS_CLASS_MAP_ITERATOR + i] =
-            JS_NewObjectProto(ctx, ctx->iterator_proto);
+            JS_NewObjectProto(ctx, ctx->class_proto[JS_CLASS_ITERATOR]);
         JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_MAP_ITERATOR + i],
                                    js_map_proto_funcs_ptr[i + 4],
                                    js_map_proto_funcs_count[i + 4]);
@@ -53093,11 +53108,17 @@ void JS_AddIntrinsicBaseObjects(JSContext *ctx)
                                   ctx->native_error_proto[i]);
     }
 
-    /* Iterator prototype */
-    ctx->iterator_proto = JS_NewObject(ctx);
-    JS_SetPropertyFunctionList(ctx, ctx->iterator_proto,
+    /* Iterator */
+    ctx->class_proto[JS_CLASS_ITERATOR] = JS_NewObject(ctx);
+    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ITERATOR],
                                js_iterator_proto_funcs,
                                countof(js_iterator_proto_funcs));
+    obj = JS_NewGlobalCConstructor(ctx, "Iterator", js_iterator_constructor, 0,
+                                   ctx->class_proto[JS_CLASS_ITERATOR]);
+    ctx->iterator_ctor = JS_DupValue(ctx, obj);
+    JS_SetPropertyFunctionList(ctx, obj,
+                               js_iterator_funcs,
+                               countof(js_iterator_funcs));
 
     /* Array */
     JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ARRAY],
@@ -53144,7 +53165,8 @@ void JS_AddIntrinsicBaseObjects(JSContext *ctx)
     ctx->array_proto_values =
         JS_GetProperty(ctx, ctx->class_proto[JS_CLASS_ARRAY], JS_ATOM_values);
 
-    ctx->class_proto[JS_CLASS_ARRAY_ITERATOR] = JS_NewObjectProto(ctx, ctx->iterator_proto);
+    ctx->class_proto[JS_CLASS_ARRAY_ITERATOR] =
+        JS_NewObjectProto(ctx, ctx->class_proto[JS_CLASS_ITERATOR]);
     JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ARRAY_ITERATOR],
                                js_array_iterator_proto_funcs,
                                countof(js_array_iterator_proto_funcs));
@@ -53186,7 +53208,8 @@ void JS_AddIntrinsicBaseObjects(JSContext *ctx)
     JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_STRING], js_string_proto_funcs,
                                countof(js_string_proto_funcs));
 
-    ctx->class_proto[JS_CLASS_STRING_ITERATOR] = JS_NewObjectProto(ctx, ctx->iterator_proto);
+    ctx->class_proto[JS_CLASS_STRING_ITERATOR] =
+        JS_NewObjectProto(ctx, ctx->class_proto[JS_CLASS_ITERATOR]);
     JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_STRING_ITERATOR],
                                js_string_iterator_proto_funcs,
                                countof(js_string_iterator_proto_funcs));
@@ -53218,7 +53241,8 @@ void JS_AddIntrinsicBaseObjects(JSContext *ctx)
     }
 
     /* ES6 Generator */
-    ctx->class_proto[JS_CLASS_GENERATOR] = JS_NewObjectProto(ctx, ctx->iterator_proto);
+    ctx->class_proto[JS_CLASS_GENERATOR] =
+        JS_NewObjectProto(ctx, ctx->class_proto[JS_CLASS_ITERATOR]);
     JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_GENERATOR],
                                js_generator_proto_funcs,
                                countof(js_generator_proto_funcs));